Tractor-mounted corn harvester



M. A. RICHARDSON TRACTOR-MOUNTED CORN HARVESTER Sept. 8, 1953 8 Sheets-Sheet l Filed Ooi. 30. 1947 [zzz/ernia".- Marn A zlcardsm A J Ir l 4 Sept. 8, 1953 M. A. RICHARDSON TRACTOR-MOUNTED CORN HARVESTER 8 Sheets-Sheet 2 Filed Oct. 50. 194'? AQ 5v @Www S K "s n gig JM, gna/,VMM

M. A. RICHARDSON TRACTOR-MOUNTED CORN HARVESTER Sept. 8, 1953 8 Sheets-Sheet 5 Filed Oct. 50. 1947 y Alai-'5.

M. A. RICHARDSON 2,651,158

TRACTOR-MOUNTED CORN HARVESTER Sept. s, 1953 8 Sheets-Sheet 4 Filed OC. 30. 1947 y Sm, my Mw Sept. 8, 1953 v M. A. Rlcl-lAFmsONl 2,651,158

TRACTORRMOUNTED coRN HARVESTER Filed oct. so, 1947 a sheets-sheet 5 "gig 6M, nd/f Y sept. s, 1953 M. A. RICHARDSON TRACTOR-MOUNTED CORN HARVESTER 8 Sheets-Sheet 6 Filed Ocf.. 30. 1947 Sept. 8, 1953 M. A. RICHARDSON TRACTOR-MOUNTED CORN HARVESTER 8 Sheets-Sheet 7 Filed Oct. 50. 194'? MMT Sept. s, 1953 TRACTOR-MOUNTED CORN HARVESTER Filed Oct. 30, 194'? 8 Sheets-Sheet 8 M. A. RICHARDSONr 2,651,158

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Patented Sept. 8, 1953 TRACTOR-MOUNTED CORN HARVESTER Martin A. Richardson, Racine, Wis., assignor to J. I. Case Company, Racine, Wis., a. corporation of Wisconsin Application october so, 1947, serial No. 783,029

` s. claims. (o1. 15s- 18) The presentV invention relates generally to corn harvesters and, in particular, to ademountable corn harvester which is adapted to be supported upon and powered fromy a tractor.

Heretofore, tractor supported corn harvesters have been unwieldy and somewhat difficult to operate. Most of the known machines have the corn picking mechanism disposed on one or both sides of the tractor. Side mounted picking mechanisms make it diicult to properly guide the implement in the held, and the complicated supporting means necessary to such a mounting makes the dismantling of the apparatus a laborious and time consuming operation. The construction of the prior art implements also made it difcult to open or clear a eld without knocking down much of the corn in the rows adjoining the entering row, with resultant damage to a considerable portion of the downed ears, and the further objection that the salvage of this corn required hand picking. In a small I ield, the damage that results when opening the eld for picking may destroy a large portion of the yield of the fieldV and reduce materially the profit :from the crop. f

The diiiiculties encountered in demounting the prior picking devices from the tractors with which such devices are used has had the further undesirahle effect of restricting the use of mounted corn pickers to large farms having a A number of tractors. On a small farm, at times it is desirable, depending upon theA crop and weather conditions, to pick corn in the forenoon and, in the afternoon, to use the same tractor for hauling material or for other purposes. With the prior art tractor-supported pickers, such flexibility is not possible.

Under the proper conditions of the crop it may be desirable to husk or to shell the ears of corn at the same time they are picked in the eld. The desirable operation will vary from day to day, and it is desirable that a corn picker be easily adapted to all of these operations. The prior art apparatus has had provisions for auxiliary husking and shelling attachments, but such attachments are both expensive to buy and complicated to install, and thus their use has been restricted.

The principal object of the present invention is. to generally improve corn picking apparatus of the class described. A more specic object of the invention is to provide a light-weight corn picking apparatus, adapted to be supported upon and powered irom. a small tractor, the arrangement being such that the apparatus can be easily and rapidly attached to the tractor, when it is desired to pick corn, andv can be easily and rapidly demounted from the tractor when the apparatus is not needed. A further object of the invention is to provide economical interchangeable processing elements which will allow added flexibility and efficiency of operation in a tractor-supported corn picker.V Other objects and advantages of the invention will be apparentby reference to the` following description and the accompanying drawings:

In the drawings:

Fig. 1 is a perspective view of the righthand side of a tractor with parts broken away having supported thereon a corn harvesting apparatus in accordance with the invention;

Fig. 2 is a view with parts in section of the drive mechanism taken from the lefthand side, of the apparatus illustrated in Fig. 1;

Fig. 3 is a fragmentary, plan view of the drive mechanism illustrated in Fig. 2;

Fig. lA is a fragmentary, diagrammatic view taken on line 4 4 in Fig. 3;

Fig. 5 is an enlarged fragmentary, side elevational View ofa part of the supporting means for the picking unit;

Fig. 6 is an elevational View taken on line 6 6 of Fig. 5v;I

Fig. 'Z is a perspective View drawn to a smaller scale of the lefthand side of the apparatus illustrated in Fig. 1;

Fig. 8 is a perspective view with parts broken away of the picking mechanism of the invention;

Figs. 9, l0, and 1l are diagrammatic, views drawn to a smaller scale illustrating the operation oi aA corn picker in accordance with the invention;

Fig. l2 is a fragmentary, side elevational View of the structural members supporting the wagon elevator which forms a part of the apparatus illustrated in the preceding figures;

Fig. v13 is a side elevational view showing certain features of the height adjusting means of the apparatus;

` Fig. 14 is an enlarged sectional View of the shock absorber which is a part of the apparatus illustrated in Fig. 13;

Fig. 15 is a perspective view with parts broken away of the lefthand side'of a tractor-supported corn picker in which is incorporated a husking unit;A

Y Fig. 16 is an enlarged perspective View of the husking unit illustrated in Fig. l5;

' Fig. 17 is an enlarged side elevational view illustrating the means for supporting the husking unit on the tractor and the means employed for driving the husking unit;

Fig. 18 is a perspective view drawn to a smaller scale of the lefthand side of a tractor-supported corn picker in accordance with the invention having incorporated therein a corn `Sheller;

Fig. 19 is an enlarged elevational view showing the method employed to support the corn Sheller on the tractor, and illustrating the drive means employed for the various sneller elements;

Fig. 20 is a fragmentary elevational view showing a novel lift jack which facilitates the operation of dismounting the picking unit; and

Fig. 21 is a perspective view of the lift jack Y illustrated in Fig. 20.

The corn picking apparatus of the invention is supported upon the tractor with which it is used so as to extend forwardly and downwardly from the front thereof. This is an important feature of the invention and is a substantial departure from the usual prior art practices. The tractor illustrated at 2| is of the tri-cycle type, and the forward wheel unit operatively cooperates with the corn picking apparatus during use, as will be hereinafter described. The apparatus is adapted to be powered from the power take-off pulley provided at one side of the tractor, The support means is so arranged that the position of the corn picking apparatus can be readily adjusted in a vertical plane, and means are provided whereby the corn picking apparatus can be readily attached to or removed from the associated tractor.

The corn picking apparatus includes a packing unit 23 for stripping the ears of corn from the stalks, an elevator unit 25 for elevating the ears to a trailing wagon, and means intermediate the picking unit and the elevator for conveying the picked ears from the picking unit to the elevator. The intermediate means is interchangeable with a husking unit and a corn shelling unit so that the material delivered to the elevator 25 may be ears of corn as stripped from the stalks, husked ears, or shelled corn. v

The corn picking apparatus of the invention is adapted to be supported upon any of the tractors that are vcommonly used about a farm. The tractor 2| is of the lighter, single plow type, and is provided with a conventional forwardly located, multi-sided tool or cultivator bar receptacle 21 which is employed to support the corn picking unit 23 of the apparatus. The tractor 2| is also provided with a conventional, intermediate tool bar supporting member 29 to which a structural member 3| is rigidly attached, as illustrated in Fig. 12, to provide the necessary support for the lower end of the elevating unit 25.

On the illustrated tractor 2|, the power take-v off or belt pulley 33 is located on the rig-hthand side of the tractor. If the power take-oli' pulley 33 is located on the opposite side, a picking apparatus constructed as a mirror image of the one to be described may be utilized.

The tractor 2| is provided with a hydraulic lift mechanism having a movable lifting arm 35 (Figs. 12 and 13) which is connected to the picking unit 23, in order that the picking unit 23 can be raised and lowered mechanically. On tractors which have no hydraulic lifting mechanism the picking unit 23 may be positioned vertically by means-of a manual adjustment, which Will be hereinafter described.

The corn picking unit 23, in accordance with the invention, includes a pair of spaced-apart, forwardly extending gathering points 39 which are fabricated from suitable sheet material. The forward ends of the gathering points 39 define a stalkway, and the rearward portions of the gathering points form a trough having an opening 4| in one side which allows the corn which is stripped from the stalks to pass outward into an ear conveying mechanism. The gathering points 39 are supported upon a frame 43 which is fabricated from suitable structural members. The frame 43 also supports a pair of gathering chains 45 which are disposed in runs along the lower edge of the gathering points 39. The gathering chains 45 effectively move the stalks of corn being picked rearwardly until they are engaged by the ear snapping means.

The snapping means comprises a pair of conventional snappingrolls 41 which extend upwardly and rearwardly as illustrated. The rolls 41 are supported by bearings 49 which are attached to the frame. In accordance with the usual practice the snapping rolls 61 are positioned in substantially parallel relation and one of the rolls is disposed somewhat higher than the other. The entire picking unit 23 is adapted to be connected to the tractor 2|, by means of a pair of bifurcated clamps 5| (Fig. 5). The clamps 5| are adapted to be connected to supporting members 53 which flt within the forward tool bar receptacles 21 of the tractor 2|.

Each of the supporting members 53 includes a stub shaft 55 which is shaped to t within the multi-sided opening 21 provided in the tractor 2| for the usual forward tool bar. The stub shaft 55 may be rigidly clamped in the tool bar opening 21 by means of a set screw 51, as illustrated. A vertically extending web portion 59 is integrally attached to each of the stub shafts 55, and to this web 59 is integrally joined an outwardly extending supporting rod 6I. The supporting rod 5| is desirably round, so as to provide for free adjustment of the height of the gathering points 39 and to provide a journal section for the idler bearings, of the drive mechanism as will be described in a subsequent paragraph. The supporting rod Bia on the lefthand side of the tractor 2| is elongated so as to provide the necessary space for supporting auxiliary apparatus, conveyors, and idlers, as will be described. The bifurcated clamps 5| are held in place on the supporting rods 6| by means of clamping bolts B3 or the like (Fig. 5). On each. side of the frame 43 for the gathering points, adjacent the bifurcated clamp connection to the tractor 2|, there is provided a vertically extending web section (65 and 65a). Each of the web sections is fabricated from a suitable metal plate and is drilled with suitable holes for connecting the gathering point frame 43 with the elevating and positioning means provided. Since the vertical height of the webs 65 and 65a determines the relative force necessary to position the gathering points 39 it is desirable to proportion the web sections so that each extends at least l0 to 12 inches above the pivot point, the supporting rod 6|.

In the apparatus illustrated, the uppermost portion of the righthand web 65a is connected to a rearwardly extending rod 61 whose other end is connected to the movable arm of a quadrant adjusting unit 69, rigidly attached to the tractor 2|. The quadrant unit 59 xes the lowermost position of the gatheringV points 39 duringthe acarrea operation ofl the implement.. Therad 'l ispira vided with a. coiled counterbalancing springh` 'lit connected tothe,- tractor- 2T, which ist. adjusted to balance the weight; or a. large portion or the. weight, or' the gathering points 319;. In order to; 'a1-low for the elevation or the gathering p0ints139i. bythe hydraulic means without repositioning the quadrant 69;. the rodi G51 is fabricatedf from a pair or tubular members, one of which; is. proportioned toslide freely,= within the other. The. tubular mem-bers are held togetherA by.l a. pin 6th which: slides freely' in a. slot 51at so as to.- permit. ve-rticat movement or the gathering points structure constitutes a lost. motion positioning means. Y

The l'erth-andl web; 65 is.- conneciu-:fdr by' means of a. rodi 13 and a chain '|25 extends around a reversing pulley 'E1 on* the tractor 2| to. the. adjusting arm 35 of' the hydrautic mechanism tFig. 1231)-, The web. GSi also connected to the tractor by a counterbalance which includes a sec-.l ond rod Tel and coiled spring 91'. A shock absorber 8e is desirably provided between the hydraulic lirting mechanism and theweb.. 65 to prf-eventl sudden shocks whenthe gathering points@ 39- are raised to their maximum elevation. rI'he shock absorber' 8% may include a saddle. member 85' on which there is supported a spring 8.1. which is connected by. means ora rod 85k and a. U; shaped strap mein-ber Sfl to the web. 65 (Fig. 14)..

The means. for theg picking unit 2235 (Figs.

2, 3;. and 4L) consti-totes. an important: feature of the present` invention. A cross: shaft: 9&3 is; J'ol nal'edinto. bearings; attached to the, webs 65 and 55o', which are integrally attached to the frame. t of the gathering points 39. The` end of' the. shaft. Se, which is on the righthand side or the machine@ is provided with a purl-ey 85 which con-n nects with the shaft through a. suitable'jfnnrpA clutch 9i. A bel-t 9e connects the pulley 95 with se power take-oh?- pulley 33 on the. tractor 2'|;. En order to provide the various lengths of' drive belt necessaryto permit the gatheringy points. 3E to be. adjusted relative tothe tractor 2d:y they belt 99* is over-length and is tensioned byl means or' a belt tightener pulley it which is hingedly at-P tachedto the web 65o. on the gathering point. iframe 43 The belt tightener [M exrearwardly and engages the. upper run ot the belt :le against which itis biased by means oi a coil spring |53 which is connected to the tractor 2 The other end; of the cross: shaft. 93: ('atthe. left side of the implement). i's operatively cone. nested to a stub shaft. |115, which is j'ournaled in bearings on the gathering point frame (33 bymeans ci? aV of inter-.meshing pinion gears $51. TheV righthand end of thev stub shaft A|05 is: pro-vided with a bevel gear |9fwhich meshes with a bevel gear i i on a shaft |132 journaled on the trarne |531. 'he shaft'. H3 is directly connected to one ot the snapping rolls 41. A pinion gear M5 on the shaft H3, intermediatethe. bevel gear tt and the snapping roll 41?, meshes with a sec,. ond pinion gear Ill which is` attached toy the. shaft of the second snapping roll El. The interrnesh--A ing gears t5 and il cause the. two snapping rolls dll' to rotate in opposite directions, which effectively strips the ears from the stalks engaged therebetween.

pair of forwardly extending shafts H3 are jou-rnaled into bear-ings disposed on the gathering pointfr'ame its, and are adapted to transmit, power to the gathering chains t5. Pinion gears |2| are attached to the. shaftslll at their rear.

lit);

warn eno. and mesh with the snapping: i011l drive sears like and. ttl'. Gooperatine' bevel gears.- liza at` the,l forward. ende of each of: the shafts M19 transmit; power to the. catherine chains; 4&5. Thev gathering chains: t5; are. drivien byl means. or sprockets E; which engagethe gathering chains. t5 sprockets K25 are supported upon gen-A erally'vcrtically extending shaftsv l21;,.whose lower end is operatively connected with the. bevel gears tifa. The drive; smockets i253 are each provided with a conventional; over-running or clutch H295.. so. that. inthe event; the gathering chains become cioglgcd no damage.` will result. to the remaindero the mechanism.,

.o tan tot provided adjacent the, opening M. in the side. of' the,I4 gathering points- 3Si to; blow trash; and' dirt .trom the ears; as theyI are snapped' trom theastali'rs.. 'Eher farr |134 issupportcdupon a. shait |133, is journaled into a. bracket |:35` on the gathering point. frame. The fan Irl: is driven by! means of; a. belt |31 which connects a. puJie-y 39 on the ran shaft. |:3-3 withfa. pulley-V Mit supported on,v a transversely extending shaft |143 which isjournaled into. bearings on the frame [3: A sprocket |45 on the-inner end of the trans,

versely extending'shaftA |143' is. connected by means of an endless |141- to a sprocket. ma on the. stub. shaft E05.. This same chain M1: extends around a inuitiple sprocket idler |516 which turnsfreely upon thev lefthand' sup-porting rod fifa, which is a part of the main support means for the. picking A suitable chain tightener |53 provided to. tension the chain. |415.

The ears which are snapped. from the stalks fall pas-t the fan lztl into a wellY which is= provided' a conventional, generally rearwardly extending, nicht. type elevator |55 which includes a chain $5.1 having metal flights |59 attached' thereto for drawing the ears of corn upward to a. conveying chute titl. The chain |51 is supported upon sprocket-s |6'3 and |651 which are attached to sha-tts F61 and le?! which are rotatably journaled into bearings on the frame 4:3. The con-r veying elevator t55 is completely enclosed by a metal shell' which protects the operator from the hazards. of the moving flights and maintains the ears ci corn in the elevator. 'The elevator |55 is driven by means of an endless4 chai-n |1I, which connects a sprocket |513 on the outer end of the 05 with a sprocket H5 attached to the upper elevator supporting shaft ltd (Fig. 2).

'The chute |!6f| extends rearwardly and downy wardiy and' connects the upperl end or the conveying elevator |55 with the wagon elevator 25 which is supported at the rear of the tractor 2 I. The chute |`6| is connected to the conveying elevater |155 by means of the hinge |11 so that it automatically adjusts itselfv to varying angleswhenthe height of the gathering poi-nts 39 is changed. The ears which are conveyed upwardly by the conveying elevator |55 fall int-o the chu-te |6|" and slide into the wagon elevator 25, which conveys them upwardly and rearwardly tol a discharge point over a Wagon'which trailsbehind the tractor 2|v to receive the picked ears (Figs. 2 and 7') The wagon elevator 215 moves the ears or corn from the chute |6f to a discharge point over a trailing wagon. The wagon elevator includes a protective cas-ing Within which runs a flight typefconveyor.

'The wagon elevator 25 is supported at its lower end' upon a pair of downwardly extending, hookshaped'memhers |19. which are attached to ther intermediate. tool bar support: 29; on theztractor 2|. The upper end of the elevator 25 is held in position by a pair of compression members |8| which adjustably connect the casing |86 with the frame of the tractor. Additional rigidity is provided by means of a forwardly extending guy member |83 which connects a yoke |85 on the casing |86 with the forward supporting web 53 which adjustably supports the elevator 25 at the desired height.

The ight type conveyor includes a sprocket |81 attached to a shaft |89 rotatably supported at the lower end of the casing |86, and a sprocket (not shown) attached to a shaft which is rotatably supported at the upper end of the casing |86. An endless chain |9| is disposed about the sprockets and a plurality of metal flight members |93 are rigidly attached to the chain |9| to lift the ears of corn upwardly to a point where they may fall into the wagon. The wagon elevator 25 is driven from the multiple-idler sprocket on the rod Ela, of the picking unit supporting bracket 53 by means of an endless chain |95 which engages a sprocket |91 attached to the inner end of the lower elevator shaft |89. A clutch (not shown) adapted to be controlled by the operator of the implement, is provided on the shaft |89 to selectively engage it with the sprocket |91 so that the elevator may be disengaged when the implement is being turned and when the wagon is not disposed below the elevator outlet.

During the operation of the apparatus in a field the stalkway between the gathering points 39 is aligned with the row of corn to be picked and the tractor 2| is moved forwardly along the row. The stalks are gathered into the snapping rolls by means of the gathering chains 45 which are disposed along the lower portion of the gathering points. The snapping rolls 41 which are disposed with their axes at different levels, as heretofore described, snap the ears from the stalks and cause them to fall down the chute 4| into the conveying elevator |55. Any trash or dirt which may come free from the ears or stalks during the snapping operation is blown out of the chute and the space between the gathering points 39 by the current of air produced by the fan 3|. The ears are elevated by the conveying elevator |55 until they fall into the rearwardly extending connecting chute |6| which directs them into the wagon elevator 25, and the wagon elevator conveys the ears upwardly and rearwardly for discharge into the trailing wagon.

The various parts of the picking mechanism are so proportioned that particularly efficient operation of the corn picking unit results when the unit is supported upon a tractor having a unitary forward truck, as illustrated at |99 in Figs. 9, 10, and l1. As shown inthe head-on view Fig. 1l, the snapping rolls 41 tilt each stalk 20| sideways as it passes rearwardly in relation to the gathering points. At the same time, the lower portion of the stalk is held in place by the passage of the forward truck |99 of the tractor 2| over its base. The rotating wheels of the truck |99 thus pull the stalks downwardly between the snapping rolls 41 and reduce the possibility of the rolls becoming clogged by too rapid feeding.

When it is desired to detach the corn picking apparatus and use the tractor for other purposes, it is merely necessary to remove the picking unit 23 from the tractor 2|. The picking unit 23 may be easily removed-by raising the rear portion of the vgathering point frame 43 enough to Yremove the weight from the bifurcated clamps 5|. This may be done by blocking up the rear end of the picking unit, or more conveniently, it can be effected by the use of special lift jacks 200 such as are illustrated in Fig. 20. The bolts 63 on the bifurcated clamps 5| are then removed; the drive chain |41 to the multiple idler |5| on the supporting rod Bla is detached; the belt 99 which provides the power for the unit is removed from its pulleys 33 and and the bolts which secure the counterbalancing rods 61, 19 and 13 to the forward webs 65 and 65a are removed. It is then necessary only to back the tractor 2| away from the picking unit 23, which detaches the gathering points 39, the conveying elevator |55, and the various drive members from the tractor 2 If the special lift jacks 200 are used, it is possible to adjust accurately the height of the bifurcated clamp 5|, so as to permit convenient disengagement and ire-engagement of the supporting members. The wagon elevator 25 may be removed, if desired, by releasing the bolts on the supporting members |8| and |83, and lifting it from the hookshaped yoke |19 which supports the lower end.

This, however, is not necessary for ordinary farm use, as the elevator 25 does not extend beyond the normal track of the tractor 2|.

In order to provide connections for the lift jacks 200, each side of the gathering point frame 49 is provided with a pair of spaced apart holes which are proportioned to enage the upper portions of the lift jacks. The lift jacks (Figs. 20 and 21) include a pair of upwardly extending, supporting members 204 and 206 which are hingedly connected at their lower ends to the inner surfaces of an outwardly extending U- shaped channel member 208 so as to permit the three members to be folded together. The upper end of each of the members 204 and 206 is provided with a hook 2 I0 and 2| 0a which is adapted to be engaged in the holes in the frame 43. One of the supporting members 206 includes a turnbuckle mechanism 2|2, so as to allow the adjustment of the lift jack 200 to various effective heights. The U-shaped member 208, extends outwardly along the ground in a direction normal to the plane of the members 204 and 206, so as to prevent the picking unit 23 from tipping over. The jack structure is reinforced by a stiffening member 2|4 which is hingedly connected to the outer end of the U-shaped member 208 and detachably connected to the supporting member 204 by means of a bolt 2|6. The stiffening member 2|4 is desirably attached to one of the outer surfaces of the member 208 so that the vertically extending members 204 and 205 can be folded within the channel member 209 so as to make a compact unit which is adapted for storage in a confined space.

Lift jack 200, in accordance with the invention, permits accurate and rapid adjustment of the height of the rear portion of the gathering point frame 43. The jack may be conveniently attached by merely engaging the hooks 2|0 and 2|0a in the holes in each side of the frame 43 while the picking unit 23 is in the raised position, and then lowering the picking unit by means of the adjusting mechanism so as to remove the weight of the picking unit 23 from the bifurcated clamps 5|. The construction of the lift jack 200 allows it to be collapsed into a small space so that it can be stored in the tractor tool box, but it provides a rigid'jacking structure when the stiiening member 2 I4 is in position,

accrues The novel structural combinations of thev in-` vention co-operate to provide a corn harvester which may be easily controlled by the operator, and which may be easily and rapidly mounted or demounted upon a tractor, especially when used in combination with the novel lift jacks, previously described. The use of a single pair of gathering points, arranged to provide a stalkway which aligns with the center line of the tractor, greatly facilitates the use of the apparatus, and permits. the installation of the corn picking apparatus upon a tractor without requiring the widening of the wheel track or other change in the characteristics of the tractor. The relatively narrow construction allows the use of the implement in small elds, where there would not be a sufficienty turning area for larger pickers. In addition, it enables the implement to pass through narrow gates and facilitates its transport on the highway.

A husking apparatus Vwhich has proven especia-ily satisfactory for use in combination with tractors and corn pickers, as above described, is illustrated at 203 in Fig. l5. The husking unit 203 comprises a frame 205 fabricated of suitable plate and angle structural members, and supported upon the supporting rod 6 la which extends outwardly from the tractor. The frame 205 is connected to the rod Gla by means of a pair of forwardly extending arms 201. The other end of a husking unit 203 is supported upon the horizontal angle bar 3|, which extends outwardly from the intermediate tool bar support 29. Thev inletv to thehusking unit 203 is an opening in the frame 205 which is disposed directly below the outlet on the conveying elevator |55.A The husk.- ing unit 203 takes the place of the chute IGI, which has previously been described.

The drive for the husking unit 203 (Figs. 16 and 17) includes a chain 209 which connects the multiple idler 5| on the supporting rod 6|a with a sprocket 2|| which is attached to a cross shaft 2|3 iournaled in suitable bearings 2| 5 (Fig. 16) in the husker frame 205. A bevel gear 2|1 on the cross shaft 2 I3 drives a bevel gear 2|8 on one of a plurality of husking rolls 2|9. In the'apparatus illustrated, two sets of husking rolls 2|9 are shown (Fig. 16), each set preferably comprising one resilient, rubber-surfaced roll which is helically grooved, and one metal roll which is provided with spaced, longitudinal grooves. The grooved rolls are adapted to grip the husks of the ears as they move into contact therewith. The irregular, cooperating surfaces provided by the helical and longitudinal grooves move the ears` rearwardly to the husking unit outlet, from which, they .fall into the wagon elevator 25. The individual husking rolls are driven by means of pinion gears 22| which mesh with a pinion gear 22|a on the shaft of the driven roll, which is connected to the bevel gear 2 I8.

The'ears are maintained in close contact with the husking rolls2|9 by means of a resiliently biased husking belt 223. The husking belt 223 is supported upon a pair of shafts 225 and 221 journaled into a frame 228. SuitableL sprockets 229 and 23| are keyed to the ends of the shafts 2.25 and 221. pair of chains 233 to which are attached a plurality of cross slats 235 which form the huskingV The sprockets 229 and 23| engage a' the rollers 231 maintain a constant pressure onV the lower portion of belt 223. The pressure of belt 223 on corn being husked is adjustable and is determined by a pair of biasing springs 239 which act upon the frame 228, the latter pivoting about Shaft 221. The rear supporting shaft 221 is journaled in the frame 205 of the husking unit 203 so as to permit free, vertical movement of the forward en d of the husking belt 22-3.

A second cross shaft 23a (Fig. 17 is rotatably journaled into the frame 205 of the husking unit 203- at its rear, lower Corner. The shaft 239 is provided with a sprocket 24| which is adapted to eo-act with a chain243 which engages the sprocket 2| on the forward cross shaft 2|3 and which4 extends around the sprocket |91 on the wagon elevator drive shaft |01. The chain 243 is provided With a suitable chain tightener '245 which is adjustably supported on the frame 205 off the huskingv unit. The husking belt 223 is operatively connected to the second cross shaft 23S by means of a chain 2,41 which operatively connects a sprocket 249 onthe supporting shaft 221-- of the husking belt 223 with a sprocket 25| on the second cross shaft 239.

A cross slat conveyor 253 is disposed below the husking rolls 2|9. The conveyor 253 is fabricated from a'pluralityof crossslats 254 which are held in place by chains v256. rlhe rearward end of the conveyor 253 is supported upon sprockets 255 on the cross Shaft 230, and the conveyor extends forwardly to another shaft 251 at the forward end Of the husking unit 203, where it is supported upon sprockets 259. The upper run of the conveyor 253 contacts a fiat, perforated, metal plate 26|. whichV is supported upon the husker frame 205 asV shown in Figs. 16 and 17.

In'operation, the husks, and any shelled corn and other material which may fall through the husking rolls 2&9. falls downwardly onto the upperrun of the slat conveyor 253, where it is moved forwardly to a discharge opening indicated by the arrow 263 in Fig. 17. As the husks andishelled corn'aremoved over the perforated nlatefi by the spaced s1ats'254, the shelled.

corn falls through the perforations onto the bottom of the'kcasing for the husking unit 203. The-.Shelledncorn is carried from the bottom of the husking unit to a discharge chute 265 (Fig. 17) by the lower run of the conveyor. The discharge chuter Z55-opens into the wagon elevator- 2 5 and any shelled corn is thus salvaged and delivered to thetrailng wagon together with the husked-ears.

Whenit is. desired to remove the corn picking unit from the tractor 2|, as described in a previous-section, the housing unit 203 may be left in place on, the side of the tractor without im? pairingthe mobility andY usefulness of the trac. tor. Thehuskrig unit 203 is arranged so that while `it coeoperates with. the picking unit23, When in place 0nw the tractor, it is fully interchangeable with other processing units when conditions are Such that it is desirable to op- Grate without .the husking unit. In this instance it is only necessary to remove the husking unit from its supports, to replace the rearwardly extending Chute which forrns a part of the simple picking unit,r and to. substitute the drive chain |35 tothe wagon elevator 2.5 for the drive chain 243 whiclrihasI been describedin connection with the husking unit- Under `certain conditions ofthe crop. it is economical to shell the corn` at the same time that itis vruck-ed.` To make thisipossiblve, the corn harvester of the invention is constructed so that it will co-operate with a small shelling unit 261 (Figs. 18 and 19) which is similar in size, and which may be substituted for, the husking Vunit 203. The forward end of the shelling unit 261 is supported upon the supporting rod 61a which engages the tractor 21 and the rear end is supported on the intermediate tool supporting member l29 which has been described in connection with other elements of the apparatus.

For the purpose of a general understanding of the co-operative relationship between the corn harvester of the invention and the corn shelling apparatus 261, a brief description of the corn shelling apparatus follows:

The corn sheller 261 includes a frame which is fabricated from suitable plate and angle members and is proportioned to be supported upon the supporting members of the tractor 21. The shelling is accomplished by a rotating cylindrical member 259 which is provided with a plurality of projecting lugs 211 adapted to engage the ears of corn when the cylindrical member 269 is rotated. A generally semi-cylindrical, perforated plate 213 is supported on the frame and co-acts with the rotating shelling cylinder 269. The distance between the lowermost point of the shelling cylinder 269 and the perforated plate 213 is such that an ear of corn will be positively engaged by the lugs on the shelling cylinder 269 as it passes between the shelling cylinder 299 and the perforated plate 213. The lugs 21| on the cylinder 269 are so arranged that the husks and broken cob portions are positively moved to the rear of the apparatus where they are discharged over a vibrating screen 215.

The shelled corn and small pieces of cob fall downwardly onto a flat, perforated metal plate 211 and a cross slat type conveyor 219 co-acts with the plate 211 to move the material forwardly. A paddle-type blower 281 is disposed under the perforated plate 211, to provide a stream of air which blows the light cob material out of the shelling unit while permitting the kernels of corn to fall into the bottom of the shelling unit 261. The shelled corn is carried rearwardly to the wagon elevator 25 by means of the lower flight of the cross slat conveyor 219.

The drive for the shelling mechanism is similar to the drive employed in the husking unit 203 which has been heretofore described. A cross shaft 283 journaled in the forward portion of the sheller frame is operatively connected with the idler sprocket |51, on the supporting member 61a, on the tractor 2l by means of a chain 285 which engages a suitable sprocket 281 on the cross shaft 283. A second sprocket on the cross shaft 283 is operatively connected by means of a chain 289 to a sprocket 29| on the rear of the shelling apparatus which is a part of the drive for the wagon elevator 25. The wagon elevator drive also includes a chain 293 which engages a sprocket keyed to the same shaft as sprocket 291 and the sprocket |91 on the wagon elevator 25.

The sheller cylinder 269 is rotated by means of a bevel gear 295 on its central supporting shaft which is operatively connected to the cross shaft 283 by means of a bevel gear 291 attached thereto. A pulley 299 on one end of the cross shaft 283 is connected by means of a double V belt 3151 to the fan 281 which provides the air blast necessary to separate the broken-up cobs from.

ofrsaid frame members in vertically spaced rela#- tion to' said hinge axis and having its other end 1 12 on therside of the shelling" unit 261, is engaged on thejback of the double V belt, and is adapted to drivegthe Vcross slat conveyer 219 by means of a chain 395 which connects a sprocket 301 on the shaft for the pulley 303 with a, sprocket 309 on the conveyer drive shaft 31|. The vibrating screen 215 is connected to an eccentric 313 by means of a pitman and bell crank linkage 311. The eccentric 313 is driven from a sprocket 315 engaged by the chain 305.

The shelling unit which has been described may be left on the tractor when it is desired to use the tractor for other purposes, in the same manner as the huskng unit. This sheller unit, in addition to being useful as a part of the complete tractor supported corn harvester, as described, may be used as a separate unit. It can be powered by a small auxiliary engine.

In the foregoing, there has been disclosed an improved single row corn picker and harvester, which can be quickly and easily attached to and removed from the tractor with which it is used. The arrangement of the gathering points, which provide a stalkway in alignment with the center line of the tractor, greatly facilitates the use of the implement. Moreover, this arrangement permits the snapping rolls to be positioned above the front wheels of a tricycle type tractor, in such relationship therewith that the tractor wheels will engage and pull the stalks through the snapping rolls during the operation of the implement.

Important novel features are incorporated into the support and drive mechanism. These make possible the use of various interchangeable processing units whereby the implement can be adapted for varying crop conditions. tion, the novel support and drive means disclosed permit ,the removal of the picking unit without 4.0.

necessitating the removal of the other portionstheforwardend of the tractor, a one-row cornA picking unit comprising a generally rigid frame structure including frame members supporting a pair ofA forwardly extending snapping rolls and Y drive means therefore and including a pair of rearwardly-presented laterally-spaced members constituting the sole supporting connection with saidtractor, said frame members each including a rearwardly facing clamping member fixedl thereto in engagement with said implement support means on opposite sides of the tractor to i positionsaid snapping rolls in generally longitudinally aligned relation with said tractor, above and forwardly of the front wheel support of the tractor, said clamping members affording hinged movementofisaid Vcorn-picking unit about the' axis 'of said implement support 'meansL power lift.- means on said tractor detachably pivotally connected with one of said frame members at a point vertically spaced from the hinge axis afforded by said implement support for swinging said pickingunit about said hinge axis, a lost motion positioning means comprising a mem-l ber having one end pivotally connected to one In addiadj ustably positionable on said tractor, said positiom'ng means also affording a manual lift for said picking unit, and detachable driving connection between said snapping roll drive means and said power take-off comprising a iiexible belt and an idler coacting therewith for maintaining said connection irrespective of the vertical position of said picking unit relative to the tractor.

2. 1n combination with a tricycle tractor having a front wheel support and a pair of cultivator bar receptacles disposed on opposite sides of and in oppositely facing relation on the forward portion of the tractor equidistant from the center line thereof, a stub member in each of said cultivator bar receptacles and extending laterally outwardly therefrom, a corn picking unit having a frame structure including spaced-apart gathering points defining a stalkway therebetween and a pair of laterally-spaced, rearwardly-extending frame members, each of said frame members having a rearwardly facing U-shaped clamping member fixed thereto and disposed on opposite sides of the longitudinal axis of said stalkway equidistantly therefrom, said clamping members engaging said stub members to position said frame structure forwardly of the front wheel support of the tractor and with the longitudinal axis of said stalkway aligned with said front wheel support, removable lock means for preventing inadvertent separation of said clamping members from said stub members, manual lost motion positioning means for said tractor comprising a quadrant mounted on said tractor, a

lever arm pivotally supported on said quadrant,

a rod connecting said lever arm with said frame structure in vertically spaced relation to said stub members and including a pair of elongated members slidably joined at adjacent end portions thereof for limited relative axial movement, and a power lift means comprising a lift arm having a yieldable connection with said frame structure in vertically spaced relation to said stub members, said lost motion positioning means coacting with said power lift means to determine the lowermost position of said corn picking unit.

3. In combination with a tricycle type tractor having a front wheel support and a power takeoff and having a pair of cultivator bar recepta- Y cles disposed on opposite sides and in oppositely facing relation on the forward portion of the tractor equidistant from the center line thereof, a stub member disposed in each of said cultivator 14 bar receptacles and extending laterally outwardly therefrom, a one-row corn picking unit comprising a generally rigid frame structure supporting a pair of forwardly extending snapping rolls and drive means therefor and including a pair of rearwardly-extending laterally spaced frame members, each of said frame members having a rearwardlyv facing U-shaped clamping member disposed on opposite sides of the longitudinal axis of said stalkway, said clamping members engaging said stub members to position said frame structure forwardly of the front wheel support of the tractor and with the longitudinal axis of said stalkway aligned with said front wheel support and affording hinged movement of said unit about the axis of said stub members on the tractor, removable locking means for preventing inadvertent separation of said clamping members from said stub members, a lost motion positioning means comprising a member having one end pivotally connected to one of said frame members in vertically spaced rel-ation to one of said stub members and having its other end adjustably positionable on said tractor, said positioning means also affording a manual lift for said picking unit, lift means comprising a member having one end pivotally connected to said rigid frame structure in vertically spaced relation to said hinge axis of said stub members and having its other end adjustably positionable on said tractor, and a detachable driving connection between said snapping roll drive means and Isaid power take-off comprising Ia flexible belt and an idler coacting therewith for maintaining said connection irrespective of the vertical position of said unit relative to the tractor.

MARTIN A. RICHARDSON.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,660,767 Ronning et al Feb. 28, 1928 2,015,708 Carlson Oct. 1, 1935 2,221,762 Gildersleeve Nov. 19, 1940 2,259,892 Hyman Oct. 21, 1941 V2,264,565 Coultas et al. Dec. 2, 1941 2,318,291 Christiance May 4, 1943 2,327,180 Diercksmeier Aug. 17, 1943 2,340,084 Scranton J-an. 25, 1944 2,351,611 Hammond June 20, 1944 2,408,939 Magee Oct. 8, 1946 2,447,122' Horst, Jr Aug. 17, 1948 2,494,080 Andrews et al Jan. 10, 1950 

